Tanto per cominciare con un po' di mistero, niente foto all’inizio di questo post: tutto sarà svelato, in prosieguo, ai non addetti ai lavori, mediante opportuni link. Gli OM, invece, potrebbero addirittura saltare direttamente alle ultime tre righe, ma forse non disdegnerebbero rivedere, con gli stessi link, alcune splendenti "chimere" dei propri sogni hobbystici.
Partiamo!
La storia della tecnologia conosce momenti in cui, per effetto del rapido succedersi di varie scoperte e miglioramenti tecnici, alcune produzioni, anche se appena iniziate, vengono interrotte per essere subito sostituite da altre che immettono sul mercato beni più avanzati e convenienti. In tali casi i beni cessati di produzione acquisiscono, tra i collezionisti, un elevato indice di rarità, dato, appunto, dal loro limitatissimo numero. Questa, nel campo dei tasti telegrafici, è stata forse la sorte tanto di un particolare tasto manuale detto sideswiper ( http://www.morsemad.com/paddles_files/198.jpg ), replaced by semi-automatic key (see post # 4), as the automatic two-button control arms (basically a double-bug) Meleahan-Valiant ( http://www.zianet.com/sparks / valiantbig.html ), produced by Shultz Tool & Machines, and then supplanted by the keyer paddle ( http://www.bencher.com/ham/images/by2.jpg ) related to on keyer ( http://w4ti.net/k5-1.jpg ), that is, to an electronic device that sends pulses to the transceiver clamps. More precisely, the keyer produces silently, to his Internal endless sequences of the two types of vice and receives signals from the electric keyer paddle, that he / she behaves like a particular type of switch, the order to send, the radio transceiver, ol'impulso short or long intervals or both to each other, depending on how the telegraph key and manipulates sets the parameters of the same keyer ( http://www.youtube.com/watch?v=X_uVQavmXCs&feature=related ) . Ear to monitor the handling of the key, the keyer produces an audible "local": This is the so-called "side tone" mentioned above in the Post No 12.
Devices sideswiper and almost identical to the double historical bugs are currently produced with innovative design, by new firms. The sideswiper, in particular, given its rudimentary mechanical structure and its very typical pattern of use, is still proving, among many fans of telegraphy, some interest ( http://sideswipernet.googlepages.com/home ), but at the moment, few production lines "classic." That, among them, that struck me most is: http://web.tiscalinet.it/i2viu/ik1ojm/sideswip.html .
For a good explanation on the use This type of horizontal telegraph key, see: http://www.youtube.com/watch?v=ZfLrgYHIpjo . The
sideswiper lot and I am curious if anyone had already used several versions, I'd love to hear your impressions about it.
Devices sideswiper and almost identical to the double historical bugs are currently produced with innovative design, by new firms. The sideswiper, in particular, given its rudimentary mechanical structure and its very typical pattern of use, is still proving, among many fans of telegraphy, some interest ( http://sideswipernet.googlepages.com/home ), but at the moment, few production lines "classic." That, among them, that struck me most is: http://web.tiscalinet.it/i2viu/ik1ojm/sideswip.html .
For a good explanation on the use This type of horizontal telegraph key, see: http://www.youtube.com/watch?v=ZfLrgYHIpjo . The
sideswiper lot and I am curious if anyone had already used several versions, I'd love to hear your impressions about it.
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